Topological Maxwell Metal Bands in a Superconducting Qutrit

We experimentally explore the topological Maxwell metal bands by mapping the momentum space of condensed-matter models to the tunable parameter space of superconducting quantum circuits. An exotic band structure that is effectively described by the spin-1 Maxwell equations is imaged. Threefold degen...

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Bibliographic Details
Published in:	Physical review letters Vol. 120; no. 13; p. 130503
Main Authors:	Tan, Xinsheng, Zhang, Dan-Wei, Liu, Qiang, Xue, Guangming, Yu, Hai-Feng, Zhu, Yan-Qing, Yan, Hui, Zhu, Shi-Liang, Yu, Yang
Format:	Journal Article
Language:	English
Published:	United States American Physical Society 30-03-2018
Subjects:	Condensed matter physics Mapping Maxwell's equations Phase transitions Superconductivity Topology
Online Access:	Get full text
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Summary:	We experimentally explore the topological Maxwell metal bands by mapping the momentum space of condensed-matter models to the tunable parameter space of superconducting quantum circuits. An exotic band structure that is effectively described by the spin-1 Maxwell equations is imaged. Threefold degenerate points dubbed Maxwell points are observed in the Maxwell metal bands. Moreover, we engineer and observe the topological phase transition from the topological Maxwell metal to a trivial insulator, and report the first experiment to measure the Chern numbers that are higher than one.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.120.130503